def test_alphabeta_vs_penalty(self):
t = TTT(3)
player1 = ABPruning(3)
player2 = ABPruning(3)
player2.set_penalty(0.2)
scores = {-4: 0, -2: 0, 0: 0, 1: 0, 3: 0, 5: 0}
game_played = 0
while game_played < 11:
if t.is_terminated():
score = t.get_score()
scores[score] += 1
game_played += 1
t = TTT(3)
pass
mover = t.get_mover()
if mover == 1:
[_, move] = player1.get(t.get_state(), mover)
t.put(move)
elif mover == -1:
[_, move] = player2.get(t.get_state(), mover)
t.put(move)
pass
print(scores)
wrong_cases = scores[-4] + scores[-2]
self.assertTrue(wrong_cases == 0)
def minimax(state, mover: int, t: TTT) -> [Score, Move]:
next_mover = -1 if mover is 1 else 1
possible_moves = t.get_available_positions(state)
corresponding_scores = []
best_score = 0
best_move = None
for index in possible_moves:
next_state = state.copy()
next_state[index] = mover
if t.is_terminated(next_state):
score = t.get_score(next_state)
corresponding_scores.append(score)
else:
[score, _] = minimax(next_state, next_mover, t)
corresponding_scores.append(score)
if mover == 1:
best_score = max(corresponding_scores)
best_move_index = corresponding_scores.index(best_score)
best_move = possible_moves[best_move_index]
elif mover == -1:
best_score = min(corresponding_scores)
best_move_index = corresponding_scores.index(best_score)
best_move = possible_moves[best_move_index]
return [best_score, best_move]
def minimax_save(state, mover: int, t: TTT, table) -> (Score, Move):
encoded_state = encode_state(state)
if encode_state in table:
return table[encoded_state]
next_mover = -1 if mover is 1 else 1
possible_moves = t.get_available_positions(state)
corresponding_scores = []
best_score = 0
best_move = None
for index in possible_moves:
next_state = state.copy()
next_state[index] = mover
if t.is_terminated(next_state):
score = t.get_score(next_state)
corresponding_scores.append(score)
else:
[score, _] = minimax_save(next_state, next_mover, t, table)
corresponding_scores.append(score)
if mover == 1:
best_score = max(corresponding_scores)
best_move_index = corresponding_scores.index(best_score)
best_move = possible_moves[best_move_index]
elif mover == -1:
best_score = min(corresponding_scores)
best_move_index = corresponding_scores.index(best_score)
best_move = possible_moves[best_move_index]
table[encoded_state] = (best_score, best_move)
return (best_score, best_move)
def test_score1(self):
t3 = TTT(3)
s = [[1, -1, 0], [-1, 1, 0], [0, 0, 1]]
s = np.array(s).reshape(-1)
terminated = t3.is_terminated(s)
score = t3.get_score(s)
self.assertTrue(terminated)
self.assertEqual(score, 5)
def _train_against(self,opponent_agent:Callable[[np.ndarray],int],numOfGames:int)->None:
agent_q_turn = self._is_first_mover
for _ in tqdm(range(numOfGames)):
game = TTT(self._size)
turn = True
# one complete game :
# prev state, action taken are from agent's turn
# next state is from opponent's turn.
# update in opponent's turn
encoded_prev_state = None
move_taken = None
encoded_next_state = None
while True:
if turn is agent_q_turn:
# Q turn :
if game.is_terminated():
break
else:
possible_moves = game.get_available_positions()
encoded_prev_state = game.get_encoded_state()
move_taken = self._epsilon_greedy_train(encoded_prev_state,possible_moves)
game.put(move_taken)
pass
pass
else:
# opponent's turn :
if not game.is_terminated():
state = game.get_state()
# move below is considered as random (sampling procedure) :
move = opponent_agent(state)
game.put(move)
pass
encoded_next_state = game.get_encoded_state()
score = game.get_score()
if encoded_prev_state is not None:
# : to avoid just after first move case ( in case of Q is second mover )
self.update(encoded_prev_state,move_taken,encoded_next_state,score)
pass
turn = not turn
pass
return None
def test_penalty_vs_penalty(self):
t = TTT(3)
player1 = ABPruning(3)
player1.set_penalty(0.7)
player2 = ABPruning(3)
player2.set_penalty(0.7)
games_played = 1
scores = set()
case1 = {1, 2, 3, 4}
case2 = {-1, -2, -3}
case3 = {0}
while True:
if t.is_terminated():
score = t.get_score()
scores.add(score)
# check whether if win,draw,lose all happened
wins = case1 & scores
loses = case2 & scores
draw = case3 & scores
if len(wins) > 0:
if len(loses) > 0:
if len(draw) > 0:
break
t = TTT(3)
games_played += 1
pass
mover = t.get_mover()
if mover == 1:
[_, move] = player1.get(t.get_state(), mover)
t.put(move)
elif mover == -1:
[_, move] = player2.get(t.get_state(), mover)
t.put(move)
self.assertTrue(len(scores) > 2)
